Show Desktop button in VB.NET Windows Form

Question

In my vb.net windows form application i want make a button that when a user cliked the button, the Desktop should be showed, (Show Desktop Button) .

Consider a form name as form1 and it got a button like "Show desktop", when user clicked, all the application should be minimized and it should show desktop, is there any Code for VB.NET Windows Form application.

Answer 1

Edit

Although my proposed solution work, but I would recommend using Code Gray's answer below, as that's the right way to do it.

---

In C# it goes like this:

using System;
using System.Runtime.InteropServices;

namespace ConsoleApplication1 {
class Program {
    [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true)]
    static extern IntPtr SendMessage(IntPtr hWnd, Int32 Msg, IntPtr wParam, IntPtr lParam);

    const int WM_COMMAND = 0x111;
    const int MIN_ALL = 419;
    const int MIN_ALL_UNDO = 416;

    static void Main(string[] args) {
        IntPtr lHwnd = FindWindow("Shell_TrayWnd", null);
        SendMessage(lHwnd, WM_COMMAND, (IntPtr)MIN_ALL, IntPtr.Zero); 
        System.Threading.Thread.Sleep(2000);
        SendMessage(lHwnd, WM_COMMAND, (IntPtr)MIN_ALL_UNDO, IntPtr.Zero);
    }
}
}

I used an online converter tool to convert the above code, please verify if it works

Imports System
Imports System.Runtime.InteropServices

Namespace ConsoleApplication1
    Class Program
        <DllImport("user32.dll", EntryPoint := "FindWindow", SetLastError := True)> _
        Private Shared Function FindWindow(lpClassName As String, lpWindowName As String) As IntPtr
        End Function
        <DllImport("user32.dll", EntryPoint := "SendMessage", SetLastError := True)> _
        Private Shared Function SendMessage(hWnd As IntPtr, Msg As Int32, wParam As IntPtr, lParam As IntPtr) As IntPtr
        End Function

        Const WM_COMMAND As Integer = &H111
        Const MIN_ALL As Integer = 419
        Const MIN_ALL_UNDO As Integer = 416

        Private Shared Sub Main(args As String())
            Dim lHwnd As IntPtr = FindWindow("Shell_TrayWnd", Nothing)
            SendMessage(lHwnd, WM_COMMAND, DirectCast(MIN_ALL, IntPtr), IntPtr.Zero)
            System.Threading.Thread.Sleep(2000)
            SendMessage(lHwnd, WM_COMMAND, DirectCast(MIN_ALL_UNDO, IntPtr), IntPtr.Zero)
        End Sub
    End Class
End Namespace